Artist Rosa de Jong continues to explore the spacious confines of glass test tubes by erecting impossibly small buildings, trees, and other inhabitable structures inside of them. For her series titled Micro Matter the Amsterdam-based artist uses traditional model-making materials and her own handcrafted structures that she suspends inside scientific instruments. You can see some of her latest sculptures on Behance, and she may eventually start selling some of her pieces online, so be sure to signup for an alert.